C EXAMPLES TUTOR: Structure and Union

Showing posts with label Structure and Union. Show all posts

PROGRAM:

#include <stdio.h>

#include<stdlib.h>

struct course

   int marks;

   char subject[30];

};

int main()

   struct course *ptr;

   int i, noOfRecords;

   printf("Enter number of records: ");

   scanf("%d", &noOfRecords);

   ptr = (struct course*) malloc (noOfRecords * sizeof(struct course));

   for(i = 0; i < noOfRecords; ++i)

       printf("Enter name of the subject and marks respectively:\n");

       scanf("%s %d", &(ptr+i)->subject, &(ptr+i)->marks);

       printf("Displaying Information:\n");

       for(i = 0; i < noOfRecords ; ++i)

       printf("%s\t%d\n", (ptr+i)->subject, (ptr+i)->marks);

   return 0;

Enter number of records: 2

Enter name of the subject and marks respectively:

Programming

Enter name of the subject and marks respectively:

Structure

Displaying Information:

Programming      22

Structure        33

PROGRAM:

#include <stdio.h>

struct student

    char name[50];

    int roll;

    float marks;

} s[10];

int main()

    int i;

    printf("Enter information of students:\n");

    for(i=0; i<10; ++i)

        s[i].roll = i+1;

        printf("\nFor roll number%d,\n",s[i].roll);

        printf("Enter name: ");

        scanf("%s",s[i].name);

        printf("Enter marks: ");

        scanf("%f",&s[i].marks);

        printf("\n");

    printf("Displaying Information:\n\n");

    for(i=0; i<10; ++i)

        printf("\nRoll number: %d\n",i+1);

        printf("Name: ");

        puts(s[i].name);

        printf("Marks: %.1f",s[i].marks);

        printf("\n");

    return 0;

Enter information of students:

For roll number1,

Enter name: Tom

Enter marks: 98

For roll number2,

Enter name: Jerry

Enter marks: 89

Displaying Information:

Roll number: 1

Name: Tom

Marks: 98

#include <stdio.h>

struct TIME

  int seconds;

  int minutes;

  int hours;

};

void differenceBetweenTimePeriod(struct TIME t1, struct TIME t2, struct TIME

     *diff);

int main()

    struct TIME startTime, stopTime, diff;

    printf("Enter start time: \n");

    printf("Enter hours, minutes and seconds respectively: ");

    scanf("%d %d %d", &startTime.hours, &startTime.minutes,

    &startTime.seconds);

    printf("Enter stop time: \n");

    printf("Enter hours, minutes and seconds respectively: ");

    scanf("%d %d %d", &stopTime.hours, &stopTime.minutes, &stopTime.seconds);

    differenceBetweenTimePeriod(startTime, stopTime, &diff);

    printf("\nTIME DIFFERENCE: %d:%d:%d - ", startTime.hours,

    startTime.minutes, startTime.seconds);

    printf("%d:%d:%d ", stopTime.hours, stopTime.minutes, stopTime.seconds);

    printf("= %d:%d:%d\n", diff.hours, diff.minutes, diff.seconds);

    return 0;

void differenceBetweenTimePeriod(struct TIME start, struct TIME stop, struct

TIME *diff)

    if(stop.seconds > start.seconds){

    --start.minutes;

    start.seconds += 60;

    diff->seconds = start.seconds - stop.seconds;

    if(stop.minutes > start.minutes){

    --start.hours;

    start.minutes += 60;

    diff->minutes = start.minutes - stop.minutes;

    diff->hours = start.hours - stop.hours;

Enter start time:

Enter hours, minutes and seconds respectively: 12

Enter stop time:

Enter hours, minutes and seconds respectively:8

TIME DIFFERENCE: 12:34:55 - 8:12:15 = 4:22:40